Yes please continue to work on the wrists. It could eventually be a problem. This article may help:
Thumbs-Around Grip | Darin Deaton
The main issue in the Squat here is that you need to shove your knees out MUCH harder. Knees need to stay in line with the toes. Are you able to see how they are caving inwards and coming forward too much. The knee should only travel a little bit past the toes during the squat. Deload to a weight you can maintain the correct knee position. Practice with the TUBOW if you have to:
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